If the statement is true, write true. If it is false, change the underlined word or words to make
the statement true.
6. Cells were discovered using electron
microscopes.
7. Ribosomes produce proteins.
8. The cells of plants and animals lack nuclei.
9. Both DNA and RNA are proteins.
10. The cell membrane is selectively permeable.
ter of

6.True

7.True

8.True

9. False, both RNA and DNA are nuclei acids. that are made from nucleotides

10. True

Explanation:

6. False- light microspcopes

7. True

8. True

9. False- Nucleic Acids

10. True

image result for describe the various types of gene mutationsghr.nlm.nih.gov

the types of mutations include: missense mutation: this type of mutation is a change in one dna base pair that results in the substitution of one amino acid for another in the protein made by a gene. nonsense mutation: a nonsense mutation is also a change in one dna base pair.

explanation:

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.